Your size is very small and really not ideal.
Editing downloaded web stills is not ideal either.
For a Meeting??? Is this playing off the computer hard drive or a DVD?
If you have HD video and Low res stills - you got a mess.
Start with a Standard SD sequence, an easy setup like NTSC DV48k Anamorphic.
Make sure the frame rate and fields match the HD video.
Re-size the HD vid to fit in the sequence.
When the edit is done, change sequence codec to Prores 422.
Re-render all. Fully.
Export using current settings. Take that file into compressor to create your deliverables.
I know I should have had the client send me all the pics instead of downloading them. I also download the vid from youtube.. so yes, it's a mess.. but the client is not picky. but I'm pulling my hair out.
I'll try your suggested settings. I can even restart the edit if need be since I'm early on.. and I'll do my best to figure it all out... not sure how to resize the HD video..but I'll figure that out.
and the playback mode can be decided by me and this will also be posted on youtube.